Draft and buffing gear.



H. E. VAN DORN.

DRAFT AND BUFFING GEAR.

APPUCATIQN FILED N0v.26. 1915.

1,251,942. Patented Jah.1,1918.

2 SHEETSSHEET I.

H. E VAN DOHN.

DRAFT AND BUYFFING GEAR.

" APPLICATION mu) NOV-76.1915- 1,25 1,9Q2 Patented Jan. 1, 1918. j 5 3 I 2 suns-sum 2. v L c ,ZZ .10 19 UNITED sTATEs ms 01 131101 1.

HERBERT E. VAN DOBN, OF CHICAGO, ILLINOIS.

mmrr AND rurrme GEAR.

1'0 all whom it may concern:

Be it known that I, Hnnnnn'r 1*). VAN Donme citizen oi the United States, and e resident .of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful linprove ments in Draft and Bulling Gears; and I do hereby declare that the following is at full, clear,- and exact description of the some, reference being had to the accompanying drew ings, and to the numerals of reference marked thereon, which form a part of this specification.

It is an objector this invention to construct a draft and buffing gear embodying a number of friction elements so designed and constructed as to Withstand draft and buffing stresses equally well, and requiring only a smell travel of the ports to absorb the stress imparted to the gear.

It is also an object of this invention to construct n. conihinetion draft and huffing gear wherein a. number of friction elements are movohly associated; With one another and capable of movement against spring ressure, which acts to increase the friction etwecn seid elements to resist and absorb stress imparted to the gear.

It furthermore an important object of this invention to construct a combination draft and hul'ling gear wherein certain of the parts are movable inwardly egeinst inclined abutment wells with increasing friction and against spring pressure. to re sist and. ahsorl'v stress, imported to the. gear, old elements when moving inwardly to ward one another having sliding engage ment with means associated therewith to further increase the friction of resistance in a. hmnner such that the friction pressure between said hitter n'i'eons increases with the i"crcase instress applied to the gear.

' It slit rally an object or this invention to construct a heavy duty draft gear embodying :1, pluilalit y" of friction elements movable with respect to one another and provided with enieccentric take-up mechanism to compensate for Wear betweenv the friction elements Specification of Letters Patent.

. Patented Jan. 1, 1918.

the longitudinally movable abutment fric tion members with the ends thereof shown in section.

Fi 6 is an end. View of the nbutn'lent mom ers showing the vertical and horizontal transverse. friction plates associated therewith.

Fig. 7 is 15, detail View showing. the toothed Wheel on the adjustingeccentric.

As shown in the d n wings:

' As shown in Figs. 2, 3-, and 4, the center cl'lonnel sills, denoted by the reference nun'ierals 1, of the ear upon which the gear is mounted, are utilized, and held rigidly in' stationary position hit ageinst the inner surfaces of said sillshy means of stops 2. llivetcd to the sills, are a pair of similarly constructed. stationary friction elements 3,

cash provided at its opposite ends with abutment-s at and 5, respectively, hich, at theirends, shut against said stops 2, and interrnedietc said nhutnflents provided with outwardly projecting angled frictions! abutmentme1nbers,onc inclined face of eh of which is denoted by the referel' ce numeral (3, and the other, by the reference numere}. 7. Riveted or others-vise rigidly secured across the top flanges of the channel sill n'iembers 1 and 2, is :1v plate 8, end similarly disposed beneath the bottom "range-a of said sill members is another plate 9,

clearly shown in Figs. 1, 2, end Fitted movnbly against said respective ,stutiozpn'y friction elements 3, are a. pair of simi e-rly constructed friction elements, each denoted by the reference numeral 10, and provided with a plurality of angled ahutmcnts 1.1, elong one surface, adapted to interfit- 'wlxth the abutments 67, of said stationary e enients. Each of said movable friction elements 10, is recessed on its inner face to at ford inclined wells 12, and fitted between said respective friction elements 10, within the recessed portions thereof against said incli '1 walls 12, are l'lpright wedge 1X1GX(\'1- bers 13 and 14, respectively, provided with a pair of lugs 15, to afford retaining means top and botto sions 18, whic ortions thereof, are extenre clearly shown in Fig. 5, and receive rted therein, friction plates 19, in spacefielation. Laid in vertical position and ei jending horizontally within the gear and interposed between said respective friction plates vl9, are a series of plates 20, with their edges adjacent to said stationary elements 3. Adjacent the forward abutments or stops 4, is a front follower plate 21, which rests against the butermost plate 20, of the forward group of plates 19--20, and another follower plate 22, is mounted between said stationery members 3, lylng flat against the outermost friction plate 20, of the rear'group of friction plates, disposed adjacent said rear stops 5. isposed at the said movable f iction elements 10,: at the rear of said follower plate 22, is a block 23,

and at the rear of said block 23, is another block 24, said blocks 23 and 24:, having registering curved recesses therein into which fits a horizontal eccentric 25.

Extending between said upright channel sill members 1, between the top and bottom lates 8 and 9, secured thereon, is a long integral yoke 26, surrounding the elements of the gear. The forward follower plate 21, bears against the forward end of said yoke and at the rear curved end of said yoke the block 24 which is curved complementally imparted'to said yoke from of the gear assembled therewith, fits closely therein, so that stresses, either buffing or draft, as the case may be, the drawbar of the car, cause-movement thereof, either for" wardly or rearwardly, as the case may be,

with a consequent resistance to. such move ment by the co-actmg friction elements cont prising the gear.

As clearly shown in Figs. 4 and 7, a toothed washer or wheel 27, is provided on each end of the eccentric 25, by which the eccentric-is held in an adjusted position and due to the fact that the toothed wheels are locked to the eccentric by split pins 28, and notches between the teeth of the wheels are engaged over lugs 29, formed on'the block 23, rotation of the wheels andmovement except for adjustment of the eccentric is prevented. Means is also provided for holding the parts during installation of the same. For this purpose registering apertures are provided through the members horizontal inserted and afterward removed when the gear has been put in place upon a car. For convenience of installing,

holes are cored draft gear is through the wedges and the movable stationary fr ction members. The holes are cored large at the outer sides of the stationary .friction members 3, to allow room for the head on one side and a nut on the other of an assembled bolt 30, to extendthrough the registered cored holes. The bolts are put in and tightened to draw the stationary friction. members together the roper distance,

to allow them to slip into p ace between the place and use the bolts to facilitate dismounting the draft gear.

The operation is as follows: The normal position ofthe elements of the s iown in Fig. 3, wherein, due to the fact that no stress is imparted to the ear, the compression of the respective springs 16 and 17 serves to impel the wedge members 13 and 14, away from one another, which in turn act to impel the movable friction. elements 10, laterally apart, and into interfitting relation with the abutments 6'-7, on the stationary members 3, secured against the sills of the car between the stops 2. flowever, in the event that a draft stress is imparted to the gear, thus causing the yoke 26, to be pulled forwardly, the angled abutments 11, on the respective movable fries bars 3, thus causing said elements 10, to be forced inwardly toward one another which in turn causes the wedge members 13 and ll, contacting the angled surfaces of said wedge members 10, to be thrust toward one another, compressing the sprinos 16 and 17 thereby. Of course, in a draft stress forward movement of the element 10, is re sisted, and due to the fact that stress is applied at the rear of the gear through the blocks and 24;, and the rear follower plate or block 2'2, the rear group of plates 19 and 20, is subjected to considerable pressure.

the inclined surfaces 7. of the stationary members, are caused to slide toward one another. an enormous friction is exerted be tween the plates 12). mounted in said mov able members or elements 20, interposed therebetween. As a conse-' quenco, the number of surfaces which-are in contact with one another between the respec tive parts of the gear, and the. pressure to Due to the fact, however, that said, ,movuhh 'elements 10, riding upwardly upon 10, and the plates,

which the same are subjected, set up an enormous resistance to movement of the elements of the gear, so that the draftis absorbed. Air exactly similar operation takes place when the bufling stressis transmitted to the gear, the only difference being thatlzhe iorwardggroup of lates 19 and 20, iS subjected to the pressure and co-act with the movable elements 10, and fixed members 3, as well as the wedge blocks 13 and .14, and springs therebetween, in resisting balling stress and absorbing the same. In the event that the many contacting surfaces of the parts of the gear become worn after constant use, thus resulting in a looseness of the parts, the eccentric 25, may be rotated an amount sufficient to increase the distance between the block 23, and the block 24:, thu thrusting the elements of the draft gear snugly within the yoke 26. This operation is performed by removin the split pins 28, from the toothed wheels 2 and withdrawing the wheels out of engagement-with the lugs 29, then rotating the same and the eccentric therewith and engaging the wheels again with the lugs 29, after which the split pins 98, are replaced to retain the wheels locked on the eccentric, and the eccentric loehedin position.

I am aware that various-details of coin struction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patentgranted other wise than necessitated by the prior art.

I claim as my invention: 1. In a draft gear-of the class described stationary members, a series or inclined abutments on each thereof, movable membersdis- .posed therebetween, a series of inclined. abut" ments on each of said movable members adapted to frictionally interfit with the inclined abutments of said stationary members, wedge members inter nivsedj beta-Wren said movable members independently of said s tionary members, and springs disposed be tween said wedge members toresist compres sion thereof by movement of said. movable members with respect to said stationary members.

'2. In adraft gear of the class described stationary members having inclined friction.

surfaecsthereon, movableniembers comple mentally shaped to interfit with said eta-- tionary members and when moved with re spect thereto to ride upon the inclined surfaces thereof, said movable members when so moved, moving toward one anotheiywedge members disposer]. between said movable membersarranged to be thrust toward one another when said movable members move toward one another sn'in s'dis osed between said wedge members to resist move ment' thereof toward one another and a plurality of groups of friction plates mounted at the ends of said movable members adapted to slide on one another and acting to fricti'onally as ist in resisting movement of the parts of the gear.

I 3. In a draft gear of the class described stationary members, movable membi-ars disposed therebelween capable oidiagonal movement with respect to said stationary members and when moved. nwving toward 0 away from one another, wedge members disposed between said movable members, a plurality of groups of coiled swings bearing at their ends against said respectire wedge .men'lbers to thrust the same apart an d resist inward movement of said movable members toward one :motlnu' groups of irietion plate at earl! end of said nnivuble mom bers adapted to slide upon one another with frictional resistance when said movable members more inwardly toward one another,

and. eciizenlrir inc-ans adjustable tel-aloe up.

for wear on the parts oi the gear.

4. In a device of the class d "ribed lhe combination with the sills of a car, oi slationar) members secured thereon. movable members included adjacent said stationary mmuliiors movable to ard one another when moved from normal in -iiher direction longitudinally of said s rmarv members, in terlitiing alui'nnnts nll said. movable and statimiary members ea ta di gone l movemen t of said an "able nnambc-rs lo take place toward one ain'ilxher when moved away from normal within-spool. to said. stationary members, resilient means interposed betn-een said movable members to resist inward movement of one another toward one anothen and a yoke d Jposed about said movable members to impart nwwzlnent thereto .due to draft or butting stresses impartcitl tn the gear.

5. 1 draft gear eoninrising siai ionary and movable irie jnn elements. and means for adjustment tor wear tween.

6. 5.. fl! more b in it... ii'rrc. on moral tionary members ineither direction, and

spring resisted wedge members disposed between said movable members operating to resist movements thereof toward one another.

7. In a draft gear of the class described, stationary stops, stationary membershaving' inclined friction surfaces thereon, movble members complementally shaped to in 3* Zrfit with said stationary members and. when moved with respect theretofto ride upon the inclined surfaces thereof, "said vmovable members when so moved moving toward one another, wed e. members disposed between said mova 1e members" arranged to be thrust toward one another 5 when said movable members move toward one another springs disposed between said wedge members to resist movement thereof toward one; another, and a plurality, of groups of friction plates mounted at the ends of said movable members adapted to slide on one another and acting to frictionally assist inresisting movement of the parts of the gear,

8. In a draftgear of the class described, stationary stops, stationary members, inclincd' abutments thereon, movable members disposed therebetween, inclined abutments on said movable members adapted to interfit the inclined abutments of said stationary members, wedge members interposed between said movable members, springs disposed between said wedge members to .resi'st compression thereof by movement of 7 said movable members with respect to said stationary members, and friction plates associated with said stationary and movable members to assist in resisting movement of the gear parts.

9. .na device of the class described, the

combination with the sills of a-ear, of stabetween said movable members to resist inward movement of one another toward one fanother, friction devices at each end of {said movable members to resist relative movement therebetween in either direction,

and ayoke disposed about said movable members to impart movement thereto due to draft or bnfiing stresses imparted to the gear. i or 10,. A draft ear comprising stationary and movable riction elements, recessed blocks associated with said movable friction elements, and eccentric means between said recessed blocks for adjustment for wear between said elements.

11. A draft ear comprising stationary and movable rictionelements, friction plates at the ends of said movable .riction elements to assist in-resisting movement of the gear arts, and eccentric means foradwith having a series of inclined abutments interfitting with the abutlnents on said stationary members adapted to resist move ment of said'movable members toward one another with a movement in. either direc;

tion longitudinally with respect to said sta tionary members, friction plates resisting. movement of said movable memberstoward one' another, and spring resisted wed e blocks interposed. between said movab e members to resist movement of said movable members toward one another.

14. A draft gear comprising stationary members, movable members associated therewith adapted tomone with respect. thereto resisted by friction, iriction plates mounted at each end of said movable members operating to resist movements thereof in-either direction relative said stationary members, spring'resisted friction means opeiiatin to resist movement of said movable .mem ers toward one another, and eccentric means mounted at one end of the gear adjustable to take up for Wear upon the parts within the gear.

In testimony whereof I hairs -"hereunto subscribed my name in the subscribing witnesses.

HERBERT Er TANHQDRE Witnesses CHARLES W. H LLs, Jn. EARL M. HARDINE.

pram-1 two 

